Plumb-level.



. suitab UNITED STATES PATENT OFFICE.

JUSTUS A. TRAUT AND FRANK L. TRAUT, OF NEW BRITAIN, CONNECTICUT, ASSIGNORS TO STANLEY RULE & LEVEL COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

PLUMB-LEVEL.

Specification of Letters Patent.

. Application filed April 8, 1908.

plumb levels of that type employing a liquid containing level glass.

The object of the invention is to simplify and improve the construction and to provide means whereby an effective adjustment may be easily secured.

In the drawings-Figure 1 is a longitudinal sectional view of our invention, certain parts being shown in elevation; Fig. 2 is an end view thereof, the cover plate bein" broken away; Figs. 3, 4, 5, 6 and 7 are detai Views.

, 1 represents the beam of a level or plumb, of ordinary construction.

2 represents the usual transverse assage through the same in which the bubb e glass is visible.

3 represents the bubble glass carried by a e container or frame 4, one end of which is mounted in the inner end of a bore extended into the beam from one edge thereof. The other end of said frame 4 is adjustably mounted at or near the entrance of said bore, so that by tilting the frame 4 up or down at. its outer end, the desired ad ustment may be effected.

5 is a guide-plate secured in a counter bored recess near the entrance to the bore in which the frame 4 stands.

6 is an im erforate cover-plate flush with the edge of t e beam 1 and applied after the other parts have been assembled and properly adjusted.

The frame 4 is preferably formed from a blank of sheet metal (see Fig. 3) having a central opening 4*" of oval outline. At one end this sheet metal blank is provided with a plurality of spring tongues 4 4 These tongues are preferably so shaped that, when the frame is rolled up, they form a stiff spring bearing slightly larger in diameter t an the body of said frame, as best seen in Fig. 1. At the opposite end the frame is preferably provided with two lugs 4 4, so arranged re atively to each other that when the frame 4 is in its final form, these lugs may be bent down so as to register with each other and provide a double thickness of stock at the end of the frame (see Figs. 1 and 4). These lugs 4 are bored to provide a screw passage which is tapped out to receive an adjusting screw 7. 8 is a washer. The bubble glass 3 is secured in the frame 4 in any well-known manner, for example, by use of plaster of paris. When the bubble glass is. in place in the frame, the latter is passed into the lateral bore in the beam 1, the spring tongues 4 yielding sufficiently to permit of this method of assembling. When the frame 4 is in place, the slotted guide-plate 5 is seated in the counter-bore and secured therein. The adjusting screw 7 is then passed through a slot or passage 5 in plate 5 and screwed into the threaded lugs 4, the washer 8 standing outside of the guide-plate 5. As will be seen, the bubble glass 3 may now be adjusted by raising or lowering the outer end of the frame 4, the inner end being suitably supported by the tongues 4 bearing against the Wall of the surrounding bore. When the proper adjustment has been ascertained, the screw 7 is set up until the guideplate 5 is clamped tightly between the lugs 4 and the washer 8. The cover-plate 6 is then a plied.

As shown in the drawings, the guide-plate 5 may have ears 5, which may be turned up before the guide-plate is inserted. The

ends of these cars 5 may then be nibbed out- Wardly, as indicated in Fig. 1, to hold the same in place.

One of the many advantages resulting from this construction, is that it permits of the successful use of sheet metal for the purpose of constructing the frame. Furthermore, by this means expansion and contraction may take place without disturbing the accuracy of the instrument, for, as will be seen, the spring tongues 4 will permit said expansion and contraction to occur without distorting the frame, no matter what may be the direction of the expansion.

By providing the peep openin 4 substantially in the center of the blan (shown in Fig. 3) a frame of handsome appearance is provided, since the edges of the material, when the frame is rolled up into tubular form, are on the under side and hidden from view.

As shown, the bore in which the frame is carried, flares outwardly slightly, thus not only permitting the yielding inner end of the frame to be easily introduced, but also giving the desired clearness for the adjustment of the outer end of the frame.

What we claim is:

1. A plumb, comprising a stock having a transverse bore therein, a bubble glass, a supporting frame therefor adapted to stand in said bore, a plurality of tongues at the inner end of said frame, said tongues making a side engagement with the wall of said bore, and an adjustable connection for the outer end of said frame with said stock.

2. A plumb, comprising a stock having a transverse bore therein, a bubble glass, a supporting frame therefor adapted to stand in said bore, a plurality of tongues at the inner end of said frame, said tongues making a side engagement with the wall of said bore, and an adjustable connection for the outer end of said frame with said stock, said adjustable connection including a slotted plate and means for holding the same at the outer end of said bore, and a fastening device passing through said slotted plate and into said frame.

3. In a plumb, a frame for a bubble glass, comprising a sheet metal body rolled into tubular form, a peep hole in said frame, and a slightly enlarged yielding inner end.

4. In a plumb, a frame for a bubble glass,

comprising a sheet metal frame rolled into tubular form, a peep hole therein, an inturned integral retaining lug at the outer end of the frame.

5. In a plumb, a frame for a bubble glass, comprising a sheet metal body rolled into tubular form, a peep hole therein, an inturned integral retaining lug at the outer end of the frame, said lug having a screwthreaded passage therein.

6. In a plumb, a frame for a bubble glass, comprising a sheet metal body rolled into tubular form, a pee hole therein, and a pair of inturned integral overlapping lugs at the outer end of the frame.

7. In a plumb, a stock having a transverse bore, a bubble glass, a supporting frame having a yielding inner end mounted in said bore, an adjusting device for the outer end of said frame comprising a slotted stationary guidepl ate, an adjusting screw passing through the slot in said guide-plate, and a screw-threaded integral bearing for said screw at the outer end of said frame.

JUSTUS A. TRAUT. FRANK L. TRAUT.

Witnesses:

G. W. TRAUT, M. C. CoNLIN. 

